The Opsera is a statistic RealGM Executive Editor Chris Reina created in order to objectively rank teams by how well they hit (OPS) and pitch (ERA).

In order to determine the Opsera rating for each, we take their OPS, multiply that number by 10 to move the decimal point over one place to the right and then subtract their ERA from that number. 

All statistics are through Sunday, May 17. Last week's rankings are in parentheses.

1. (1) Los Angeles Dodgers – 4.92

The Dodgers stay on top for the third week in a row. Adrian Gonzalez ranks in the top seven in all three Triple Crown categories. MVP candidate?

2. (2) St. Louis – 4.45

The Cardinals have the top pitching staff in baseball in terms of ERA (2.87).

3. (3) Kansas City – 4.28

Only the Blue Jays and Nationals have scored more runs than the Royals this season.

4. (8) Detroit-  4.16

The Tigers are back in the top five and are keeping pace with the Royals. 

5. (4) New York Yankees – 3.78

The Yankees are on a four-game skid, but have dropped only one spot and remain on top in the American League East.

6. (5) Houston – 3.71

7. Washington – 3.71

8. (13) San Francisco – 3.68

9. (6) New York Mets – 3.59

10. (9) Tampa Bay – 3.47

11. Pittsburgh – 3.42

12. (19) Oakland – 3.28

13. (10) Baltimore – 3.28

14. (20) Chicago Cubs – 3.15

15. (21) Seattle – 3.13

16. (23) Los Angeles Angels – 3.06

17. (12) Arizona – 2.98

18. (15) Minnesota – 2.97

19. (16) Miami – 2.95

20. (17) Cincinnati – 2.88

21. (22) Atlanta – 2.87

22. (26) Cleveland – 2.83

23. (23) Toronto – 2.75

24. (18) San Diego – 2.75

25. (24) Texas – 2.64

26. (27) Chicago White Sox – 2.37

27. (25) Colorado – 2.20

28. (29) Boston – 2.13

29. (28) Philadelphia – 2.11

30. (30) Milwaukee – 1.95